Aircraft Instruments Flashcards
(24 cards)
- What three flight instruments are normally operated from the pitot-static system?
Airspeed
VSI
Altimeter
- What instrument indications will result if the static pressure line becomes disconnected inside the cabin of a pressurized aircraft?
Altimeter & Airspeed - will be lower than normal
VSI - indicate momentary decent then return to zero
- Who is authorized to perform test to calibrate an altimeter?
Manufacture or certified repair station
- What is required after replacement of components connected to the pitot static system?
Leak test
- In wet - type vacuum pumps, what are the vanes made from?
Steel
- how are vanes of a wet-type vacuum pump lubricated?
Engine oil
- What are the sources of power to horoscopes instrument operation?
Vacuum
Electricity
Air pressure
- What causes an electric driven gyro rotor to tilt when aircraft is turned on?
Gyroscopic procession
- What is used as a guide for range marking of aircraft instruments?
Aircraft Specifications or TCDS & specific aircraft maintenance manual or flight manual
- Where are instrument range markings placed?
Outer edge of the cover glass
- What other type of mark is required when range markings are applied to the glass instrument cover?
Index mark used to indicate glass slippage
- What is a synchro-type remote indicating system?
Shows movement & position of
Landing gear
Wing flaps
Oil cooler doors
Or other moveable parts
- What type of fuel quantity system is an electric fuel measuring device that accurately determines the density weight of the fuel in the tanks of an aircraft?
Capacitor fuel type quantity system
- What is meant by “swinging a compass”?
Adjustment of North-South & East-West magnets to reduce deviation
- When inspecting a magnetic compass, the bowl should be filled with liquid and should not contain any bubbles or discolorations. What is the purpose of the liquid in the bow?
Dampen oscillations of the float
- What is the fluid used in a magnetic compass?
Clear fluid such as kerosene
- Where is the compass correction card placed?
Near the compass in plain sight of pilot
- Which instrument is used to indicate the speed of the crankshaft of a reciprocating engine and the speed of the main rotor assembly in a turbine engine?
Tachometer
- What type of indicating system is used to indicate turbine engine exhaust fast temperature?
Thermocouple system
- What does the manifold pressure gauge indicate when the engine is not operating?
Atmospheric pressure
- What is used to check a manifold pressure gauge for correct indication when the engine is not operating?
Barometer or altimeter once its zero out
- What is the meaning of the yellow range on the airspeed indicator?
Cautionary range
- What does a Mach meter indicate?
Ratio aircraft speed to the speed of sound at a certain altitude & temperature
- Why do you not try to remove a blockage in a pitot system?
Prevent further damage to system
